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Finding the Fourth Proportional to 15,000.31, 20,700.30 and 8,286.11

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Solution

The fourth proportional to 15,000.31, 20,700.30 and 8,286.11 is: 11,434.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,000.31 : 20,700.30 = 8,286.11 : x
  2. Step 2: Convert to fraction form
    15,000.31/20,700.30 = 8,286.11/x
  3. Step 3: Cross multiply
    15,000.31x = 20,700.30 × 8,286.11
  4. Step 4: Simplify right side
    15,000.31x = 171,524,938.88
  5. Step 5: Solve for x
    x = 171,524,938.88/15,000.31
  6. Step 6: Final answer
    x = 11,434.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.